A connecting lock with self-locking function

Abstract

This utility model relates to the field of building construction formwork components, and more specifically, to a connecting lock with a self-locking function, comprising a pin, an elastic element, and a pin plate. The pin has a first opening at its end and a second opening on its side. The pin also has a receiving cavity, which is connected to both the first and second openings. The elastic element is fixedly installed in the receiving cavity. The pin plate is inserted into the receiving cavity through the first opening and abuts against the elastic element. The elastic element can rotate the pin plate so that one end protrudes from the second opening, while the other end of the pin plate is located outside the first opening. The pin plate is also engaged with the pin.

Description

Technical Field

[0001] This utility model relates to the field of building construction formwork components, and more specifically, to a connecting lock with a self-locking function. Background Technology

[0002] Connecting locking devices are a widely used key component for scaffolding connections. Their core function is to quickly and reliably connect and disconnect two or more components. However, the design of traditional locking devices has the following technical pain points: 1. They are prone to accidental unlocking under dynamic loads or vibration environments, resulting in high operational complexity; 2. Some locking devices require manual knobs, auxiliary tools (such as screwdrivers), or the coordinated operation of two or more people to lock, which reduces the ease of use. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a connection lock with a self-locking function. It is simple to operate, highly reliable, not prone to accidental unlocking under dynamic load or vibration environment, and can achieve the locking function without the aid of auxiliary tools.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A self-locking fastener is provided, comprising a pin, an elastic element, and a pin plate. The pin has a first opening at one end and a second opening on its side. The pin also has a receiving cavity, which is connected to both the first and second openings. The elastic element is fixedly installed in the receiving cavity. The pin plate is inserted into the receiving cavity through the first opening and abuts against the elastic element. The elastic element can rotate the pin plate so that one end protrudes from the second opening, while the other end of the pin plate is located outside the first opening. The pin plate is also engaged with the pin.

[0006] This utility model's self-locking connecting latch utilizes a receiving cavity within the pin body, embedding an elastic element inside. When the pin piece is inserted into the pin body, the elastic element pushes the pin piece out of a second opening, creating a limiting position from the outside of the pin body. The pin piece and pin body form a locking structure with a snap-fit ​​connection. The elasticity of the element itself ensures that the pin piece cannot be unlocked under dynamic loads or vibrations, provided it is not subjected to external downward pressure, thus achieving a self-locking function. During scaffolding installation, connecting rods are used to stabilize two uprights. These connecting rods can be connected and fixed to the uprights using the connecting latch. Specifically, when the pin body passes through the upright and inserts into the connecting rod, the pin piece is pressed down, causing the elastic element to contract. The pin piece passes smoothly through the connecting rod, and after passing through, the elastic element springs out, causing the pin piece to protrude from the pin body and snap into it. This uses the pin piece to block and limit the connection of the connecting rod, achieving a locking function. The self-locking function of the connecting latch further enhances the reliability of the connection between the connecting rod and the upright.

[0007] Furthermore, the elastic element has a first guide structure at its end near the pin, and the pin has a second guide structure at its end near the elastic element. When the pin abuts against the elastic element, the first guide structure abuts against the second guide structure. The first guide structure guides the pin as it enters the pin body from the first opening and abuts against the end of the elastic element, allowing it to move upward along the elastic element. Then, the restoring force of the elastic element after compression causes the pin to swing, thus being pushed out from the second opening. After one end of the pin is pushed out of the second opening, since the other end is still outside the first opening, the pin cannot move under the action of the elastic element, and a reliable engagement is formed between the pin and the pin body. Because the pin protrudes from the pin body, it forms a limiting and locking mechanism for the connecting rod that is inserted into the pin body. Preferably, the first guide structure is an inclined plane. The second guide structure has the same function as the first guide structure, also guiding the pin when it abuts against the elastic element, allowing the pin to swing upward. The second guide structure can be an inclined plane that matches the first guide structure. The two work together to facilitate the smooth rotation of the pin.

[0008] Furthermore, the elastic element has a U-shaped structure. The U-shaped elastic element forms a clearance gap inside the U-shape, which facilitates clearance when the pin and the elastic element abut against each other and swings. When unlocking is required, pressure is applied to the pin from the outside, causing the pin to swing downward relative to the elastic element. When the elastic element is compressed, it has clearance space, so that the connecting rod can pass smoothly through the pin.

[0009] Furthermore, the elastic member is provided with a recessed arc-shaped structure near the second opening. The recessed arc-shaped structure facilitates the avoidance of the pin body when it is embedded in the receiving cavity of the pin body, and ensures that when the end of the elastic member lifts the pin, the upper side of the elastic member does not interfere with the pin body, so that the elastic member has sufficient restoring force to lift the pin.

[0010] Furthermore, the pin has a groove in the middle. When the end of the pin protrudes from the second opening, the groove engages with the end of the pin. The groove design facilitates engagement between the groove and the part between the pin end and the second opening after the pin protrudes from the second opening, thus maintaining the pin's position and limiting the connection rod, achieving the locking function of the connection latch.

[0011] Furthermore, the groove has an M-shaped structure. This design facilitates reliable engagement between the pin and the pin body.

[0012] Furthermore, the outer diameter of the end of the pin located outside the first opening is larger than the inner diameter of the first opening; the outer diameter of the end of the pin located outside the first opening is smaller than the outer diameter of the pin body located at the end of the first opening. This configuration ensures reliable engagement between the pin and the pin body, achieving the locking function of the connection lock; it also ensures that the pin will not interfere when the pin body passes through the scaffold columns and connecting rods, allowing the pin body to pass smoothly before achieving the locking function.

[0013] Furthermore, a third guide structure is provided on the opposite side of the pin end corresponding to the second guide structure. The second guide structure guides the pin when it contacts the elastic element; the third guide structure guides the pin when it contacts the scaffold column and connecting rod, so that the pin can move downward to compress the elastic element, allowing the pin to be temporarily hidden in the receiving cavity of the pin body, and allowing the pin body to pass smoothly through the column and connecting rod. Preferably, the third guide structure is also an inclined plane. The second and third guide structures are both located at the same end of the pin, but in different positions; the second guide structure is located on the side closer to the elastic element, and the third guide structure is located on the opposite side.

[0014] Furthermore, the pin body is provided with a limiting step, the outer diameter of which is larger than the outer diameter of the pin body at the second opening. The limiting step is used to limit the position of the column. The pin body at the limiting step must pass through the column and connecting rod at the first opening end, while the other end of the pin body at the limiting step is located on the other side of the column. Therefore, the locking structure of the limiting step, the pin piece, and the pin body cooperates with each other to lock both sides of the column and connecting rod.

[0015] Furthermore, the pin body has an external thread located at the end furthest from the first opening. The external thread facilitates the connection of the pin body to the outside world.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The self-locking connector of this utility model simplifies the operation process and reduces manufacturing costs. At the same time, it improves connection stability through an innovative self-locking mechanism, has high reliability, is not prone to accidental unlocking under dynamic load or vibration environment, and can achieve the locking function without the aid of auxiliary tools. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a connecting lock with a self-locking function according to the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the pin body in the first direction of this utility model;

[0020] Figure 3This is a schematic diagram of the second direction of the pin body of this utility model;

[0021] Figure 4 for Figure 3 AA section view;

[0022] Figure 5 This is a schematic diagram of the structure of the elastic element of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the pin of this utility model;

[0024] Figure 7 This is a schematic diagram of the structure of a connecting latch pin with self-locking function of this utility model when it is just inserted into the pin body;

[0025] Figure 8 This is a schematic diagram of the structure of a self-locking connecting latch pin of this utility model when it is pushed up by an elastic element;

[0026] Figure 9 This is a schematic diagram of the structure of a self-locking connecting latch pin after it is pushed out by an elastic element according to this utility model.

[0027] Figure 10 This is a schematic diagram illustrating a usage scenario of a self-locking connecting latch according to this utility model;

[0028] Figure 11 for Figure 10 Enlarged view of a section at point B in the middle;

[0029] Figure 12 This is a schematic diagram of the first state when the connecting rod is engaged with a connecting lock with a self-locking function.

[0030] Figure 13 This is a schematic diagram of the second state when the connecting rod is engaged with a connecting lock with a self-locking function.

[0031] Figure 14 This is a schematic diagram of the third state when the connecting rod is engaged with a connecting lock with a self-locking function.

[0032] The markings in the diagram are explained below:

[0033] 1. Pin; 11. First opening; 12. Second opening; 13. Receiving cavity; 14. Limiting step; 2. Elastic element; 21. First guide structure; 22. Arc structure; 3. Pin piece; 31. Second guide structure; 32. Groove; 33. Third guide structure; 4. Column; 5. Connecting rod; 6. Connecting lock. Detailed Implementation

[0034] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0035] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] Example 1

[0037] like Figures 1 to 14 The image shows a first embodiment of a self-locking connecting latch according to this utility model. Figure 1 The device includes a pin body 1, an elastic element 2, and a pin piece 3. The pin body 1 has a first opening 11 at one end and a second opening 12 on the side. The pin body 1 also has a receiving cavity 13. The first opening 11 and the second opening 12 are both connected to the receiving cavity 13. The elastic element 2 is fixedly installed in the receiving cavity 13. The pin piece 3 is inserted into the receiving cavity 13 from the first opening 11 and then abuts against the elastic element 2. The elastic element 2 can move the pin piece 3 to swing so that one end protrudes from the second opening 12. The other end of the pin piece 3 is located outside the first opening 11. The pin piece 3 is also engaged with the pin body 1.

[0038] The connecting latch with self-locking function of this utility model, such as Figures 7 to 9 By providing a receiving cavity 13 in the pin body 1, the elastic element 2 is embedded inside the pin body 1. When the pin piece 3 is inserted into the pin body 1, the elastic element 2 pushes the pin piece 3 out of the second opening 12, thus forming a limit from the outside of the pin body 1. The pin piece 3 and the pin body 1 form a locking structure. Utilizing the elastic force of the elastic element 2 itself, the pin piece 3 cannot be unlocked under dynamic load or vibration environments, as long as it is not subjected to external downward pressure, thus achieving a self-locking function. Figures 10 to 14During scaffolding installation, connecting rods 5 are needed to stabilize the two uprights 4. Connecting rods 5 are connected and fixed to the uprights 4 via connecting locks 6. Specifically, when the pin 1 passes through the upright 4 and inserts into the connecting rod 5, the pin piece 3 is pressed down, causing the elastic element 2 to retract. The pin piece 3 smoothly passes through the connecting rod 5. After passing through, the elastic element 2 springs out the pin piece 3, causing it to protrude from the pin 1 and engage with it. Thus, the pin piece 3 blocks and limits the connection of the connecting rod 5, achieving a locking function. The connecting lock 6 has a self-locking function, making the connection between the connecting rod 5 and the upright 4 more reliable. Figures 2 to 4 The pin 1 is made of carbon steel in one piece and is cylindrical in shape. The front part is a hollow tube structure and a quadrilateral groove is set on the cylindrical surface at the second opening 12.

[0039] Among them, such as Figure 5 The elastic element 2 has a first guide structure 21 near the end of the pin 3, such as... Figure 6 The pin 3 is provided with a second guide structure 31 at the end near the elastic member 2. When the pin 3 abuts against the elastic member 2, the first guide structure 21 abuts against the second guide structure 31.

[0040] The first guide structure 21 guides the pin 3 as it enters the pin body 1 through the first opening 11 and abuts against the end of the elastic member 2. The pin 3 moves upward along the elastic member 2, and then the restoring force of the elastic member 2 after compression causes the pin 3 to swing, thus being pushed out from the second opening 12. After one end of the pin 3 is pushed out of the second opening 12, the other end remains outside the first opening 11, and under the action of the elastic member 2, the pin 3 cannot move, forming a reliable engagement between the pin 3 and the pin body 1. Because the pin 3 protrudes from the pin body 1, it also limits and locks the connecting rod 5 that is inserted into the pin body 1. Preferably, the first guide structure 21 is an inclined plane. The second guide structure 31 has the same function as the first guide structure 21, guiding the pin 3 when it abuts against the elastic member 2, allowing the pin 3 to swing upward. The second guide structure 31 can be an inclined plane matching the first guide structure 21; both work together to facilitate the smooth swinging of the pin 3.

[0041] As an improvement to this embodiment, the elastic element 2 has a U-shaped structure.

[0042] The U-shaped elastic element 2 forms a clearance gap inside the U-shape, which is beneficial for the clearance when the pin 3 and the elastic element 2 come into contact and swing. When unlocking is required, pressure is applied to the pin 3 from the outside, causing the pin 3 to swing downward relative to the elastic element 2. When the elastic element 2 is compressed, it has clearance space, so that the connecting rod 5 can pass smoothly through the pin 1.

[0043] Furthermore, a recessed arc-shaped structure 22 is provided on the side of the elastic member 2 near the second opening 12.

[0044] The recessed arc-shaped structure 22 facilitates the avoidance of the pin 1 when it is embedded in the receiving cavity 13 of the pin 1. It also ensures that when the end of the elastic element 2 lifts the pin 3, the upper side of the elastic element 2 does not interfere with the pin 1, so that the elastic element 2 has sufficient restoring force to lift the pin 3. Preferably, the elastic element 2 is a spring sheet with one straight edge and the other side having a beveled edge. The beveled edge is located at the end of the arc-shaped structure 22, which is the first guide structure 21, facilitating the guidance of the pin 3 during installation. The connection between the straight edge and the recessed arc-shaped structure 22 is an arc structure, which facilitates the compression and opening of the elastic element 2.

[0045] As an improvement to this embodiment, the pin 3 has a groove 32 in the middle. When the end of the pin 3 protrudes from the second opening 12, the groove 32 engages with the end of the pin 1.

[0046] The design of the groove 32 allows the pin 3 to protrude from the second opening 12 and then engage with the part between the end of the pin 1 and the second opening 12, so that the pin 3 can maintain its position and limit the connecting rod 5, thereby realizing the locking function of the connecting latch 6.

[0047] As an improvement to this embodiment, the pin 1 is provided with a limiting step 14, and the outer diameter of the limiting step 14 is greater than the outer diameter of the pin 1 located at the second opening 12.

[0048] The limiting step 14 is used to limit the position of the column 4. The pin 1, located at the end of the limiting step 14 to the first opening 11, needs to pass through the column 4 and the connecting rod 5. The other end of the pin 14 is located on the other side of the column 4. Therefore, the locking structure of the limiting step 14, the pin 3, and the pin 1 cooperates with each other to lock the column 4 and the connecting rod 5 on both sides. Preferably, the limiting step 14 has a hexagonal structure.

[0049] As an improvement to this embodiment, the pin 1 is provided with an external thread at the end away from the first opening 11.

[0050] The external thread facilitates the connection between pin 1 and the outside world.

[0051] Example 2

[0052] The following is a second embodiment of the connecting latch with a self-locking function according to this utility model. This embodiment is similar to the first embodiment, except that the groove 32 has an M-shaped structure. This design facilitates the reliable engagement of the pin 3 and the pin 1.

[0053] Example 3

[0054] The following is an embodiment 3 of a self-locking connecting latch 6 of the present invention. This embodiment is similar to embodiment 1, except that the outer diameter of the end of the pin 3 located outside the first opening 11 is larger than the inner diameter of the first opening 11; the outer diameter of the end of the pin 3 located outside the first opening 11 is smaller than the outer diameter of the pin 1 located at the end of the first opening 11.

[0055] This design ensures reliable engagement between pin 3 and pin 1, enabling the locking function of the locking latch 6. It also prevents pin 3 from interfering with pin 1 as it passes through the scaffold columns 4 and connecting rods 5, allowing pin 1 to pass smoothly before locking. Here, the outer diameter of pin 3 refers to its maximum size. Pin 3 can be a column, an irregular geometric structure, a block structure, or a sheet structure.

[0056] As an improvement to this embodiment, the pin 3 end is provided with a third guide structure 33 on the other side of the second guide structure 31.

[0057] The second guide structure 31 guides the pin 3 when it contacts the elastic element 2; the third guide structure 33 guides the pin 3 when it contacts the scaffold column 4 and connecting rod 5, so that the pin 3 can move downward to compress the elastic element 2, allowing the pin 3 to be temporarily hidden in the receiving cavity 13 of the pin body 1, and allowing the pin body 1 to pass smoothly through the column 4 and connecting rod 5. Preferably, the third guide structure 33 is also an inclined plane. The second guide structure 31 and the third guide structure 33 are both located at the same end of the pin 3, but in different positions. The second guide structure 31 is located on the side closer to the elastic element 2, and the third guide structure 33 is located on the opposite side.

[0058] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A connecting latch with a self-locking function, characterized in that, The device includes a pin (1), an elastic element (2), and a pin piece (3). The pin (1) has a first opening (11) at one end and a second opening (12) on the side. The pin (1) also has a receiving cavity (13). The first opening (11) and the second opening (12) are both connected to the receiving cavity (13). The elastic element (2) is fixedly installed in the receiving cavity (13). The pin piece (3) is inserted into the receiving cavity (13) from the first opening (11) and then abuts against the elastic element (2). The elastic element (2) can move the pin piece (3) to rotate so that one end protrudes from the second opening (12). The other end of the pin piece (3) is located outside the first opening (11). The pin piece (3) is also engaged with the pin (1).

2. The self-locking connecting latch according to claim 1, characterized in that, The elastic member (2) has a first guide structure (21) at the end near the pin (3), and the pin (3) has a second guide structure (31) at the end near the elastic member (2). When the pin (3) abuts against the elastic member (2), the first guide structure (21) abuts against the second guide structure (31).

3. The self-locking connecting latch according to claim 1 or 2, characterized in that, The elastic element (2) has a U-shaped structure.

4. The self-locking connecting latch according to claim 3, characterized in that, The elastic member (2) is also provided with a recessed arc-shaped structure (22) on the side near the second opening (12).

5. The self-locking connecting latch according to claim 1, characterized in that, The pin (3) has a groove (32) in the middle. When the end of the pin (3) protrudes from the second opening (12), the groove (32) engages with the end of the pin (1).

6. The connecting latch with self-locking function according to claim 5, characterized in that, The groove (32) has an M-shaped structure.

7. The connecting latch with self-locking function according to claim 2, characterized in that, The outer diameter of the end of the pin (3) located outside the first opening (11) is greater than the inner diameter of the first opening (11); the outer diameter of the end of the pin (3) located outside the first opening (11) is smaller than the outer diameter of the pin body (1) located at the end of the first opening (11).

8. The connecting latch with self-locking function according to claim 7, characterized in that, The pin (3) is further provided with a third guide structure (33) on the other side of the second guide structure (31).

9. The connecting latch with self-locking function according to claim 1, characterized in that, The pin (1) is provided with a limiting step (14), and the outer diameter of the limiting step (14) is greater than the outer diameter of the pin (1) located at the second opening (12).

10. The connecting latch with self-locking function according to claim 1, characterized in that, The pin (1) is provided with an external thread at the end away from the first opening (11).

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